Heidelberg 2015 – wissenschaftliches Programm
A 5.3: Vortrag
Montag, 23. März 2015, 15:00–15:15, C/kHS
3He magnetometer for extreme precision measurement of high magnetic field — •Andreas Maul1, Anna Nikiel1, Peter Blümler1, Werner Heil1, Ernst Otten1, Sergej Karpuk2, Manfred Hehn3, Laura Schreiber4, and Maxim Terekhov4 — 1Institute of Physics, Johannes Gutenberg-Universität Mainz — 2Institute for Nuclear Chemistry, Johannes Gutenberg-Universität Mainz — 3MPI for Polymer Research, Mainz — 4University Medical Center Mainz
Precise measurements and monitoring of high magnetic field are required for instance in high resolution mass spectroscopy using Penning traps or in the g-2 muon experiment. Our approach uses nuclear magnetic resonance detection on gaseous, nuclear spin-polarized 3He. The nuclei of the 3He gas are spin-polarized in-situ using a new, non-standard variant of the Metastability Exchange Optical Pumping (MEOP). The essential point is that coherent spin-precession times (T2*) of several minutes can be obtained in fields of > 1 Tesla . From the measured Larmor frequency the local magnetic field can be determined with an relative accuracy better than 10−12. Such a device can be miniaturized to fit next to a Penning trap in order to monitor and determine magnetic fields even at low temperatures and ultrahigh vacuum conditions. The current status and first results of the experiment will be presented.
 A. Nikiel, P.Blümler, W.Heil, M.Hehn, S.Karpuk, A.Maul, E.Otten, L.M.Schreiber, and M.Terekhov, Eur. Phys. J. D, 68 (2014), 330